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Aerial panoramic view of the casino and thermal buildings of Châtelguyon, in Auvergne, with cars parked in front of the casino and lush trees. On the reverse, a handwritten letter addressed to Élise Guyon in Billom, with a 170 franc postal stamp and a cancellation mark from the thermal station of Châtelguyon (Puy-de-Dôme) dated 1965.